US6039302A - Swabbable luer-activated valve - Google Patents

Swabbable luer-activated valve Download PDF

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Publication number
US6039302A
US6039302A US09/394,169 US39416999A US6039302A US 6039302 A US6039302 A US 6039302A US 39416999 A US39416999 A US 39416999A US 6039302 A US6039302 A US 6039302A
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United States
Prior art keywords
section
cannula
valve
inlet
valve according
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Expired - Lifetime
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US09/394,169
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English (en)
Inventor
Andrew L. Cote, Sr.
Charles F. Ganem
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NP Medical Inc
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Nypro Inc
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Priority to US09/394,169 priority Critical patent/US6039302A/en
Priority to US09/479,327 priority patent/US6883778B1/en
Application granted granted Critical
Publication of US6039302A publication Critical patent/US6039302A/en
Assigned to NYPRO, INC. reassignment NYPRO, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COTE, ANDREW L., SR., GANEM, CHARLES F.
Priority to US09/810,087 priority patent/US7100890B2/en
Priority to US10/700,344 priority patent/US7789864B2/en
Assigned to NP MEDICAL INC. reassignment NP MEDICAL INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NYPRO INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • A61M2039/261—Valves closing automatically on disconnecting the line and opening on reconnection thereof where the fluid space within the valve is increasing upon disconnection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • A61M2039/266—Valves closing automatically on disconnecting the line and opening on reconnection thereof where the valve comprises venting channels, e.g. to insure better connection, to help decreasing the fluid space upon disconnection, or to help the fluid space to remain the same during disconnection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • A61M2039/267—Valves closing automatically on disconnecting the line and opening on reconnection thereof having a sealing sleeve around a tubular or solid stem portion of the connector
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • A61M2039/267—Valves closing automatically on disconnecting the line and opening on reconnection thereof having a sealing sleeve around a tubular or solid stem portion of the connector
    • A61M2039/268—Valves closing automatically on disconnecting the line and opening on reconnection thereof having a sealing sleeve around a tubular or solid stem portion of the connector wherein the stem portion is moved for opening and closing the valve, e.g. by translation, rotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S604/00—Surgery
    • Y10S604/905—Aseptic connectors or couplings, e.g. frangible, piercable

Definitions

  • the present invention relates to valves that may be actuated by nozzles and in particular by male Luer fittings.
  • the present invention is directed to a normally closed valve that may be opened upon insertion of a nozzle, which in a preferred embodiment is a male Luer fitting.
  • the valve permits two-way flow when opened by a luer-taper nozzle and is able to resist large back pressures.
  • the valve includes a substantially rigid housing that defines a passageway having an inlet section and an outlet section.
  • the housing has an exterior inlet face to which the inlet section opens.
  • the inlet section preferably has tapered and expanding zones, with the tapered zone being adjacent the exterior inlet face and being shaped to receive the nozzle, and with the expanding zone being adjacent to the tapered zone and having a larger inner diameter than the tapered zone's inner diameter.
  • the exterior of the inlet section of the housing has threads to accept luer-lock threads that may surround the nozzle.
  • the valve also includes a substantially rigid cannula disposed within the passageway and extending into the inlet section.
  • the cannula is movable between first and second positions corresponding to closed and open modes of the valve.
  • the valve further includes a substantially flexible, resilient gland member having (i) a seal section disposed over the inlet section and disposed around the cannula between cannula and the housing, and in a preferred embodiment, (iii) an attachment section connected to the tubular section and attached to the housing.
  • the seal section has a normally closed aperture therethrough, and preferably has an outer diameter that is larger than the inner diameter of the tapered zone of the housing's inlet section and smaller than the inner diameter of the expanding zone.
  • the inlet end of the cannula and the gland are preferably shaped so as to permit the gland's seal section to move with respect to the cannula.
  • the valve includes means for limiting this movement of the seal section, for example by including a step on either the cannula's inlet end or the inner diameter of the gland.
  • the inlet end of the cannula may be shaped to urge the seal section open when nozzle presses the seal section against the inlet end of the cannula while the seal section is in the expanding zone of the housing inlet section.
  • a space is provided between the seal section and the cannula when the valve is in the closed position.
  • the seal section When the valve is in its closed mode, the seal section is substantially aligned with the exterior inlet face of the housing so as to provide a swabbable surface; preferably the seal section extends a small amount beyond the exterior inlet face so as to ensure that the seal section surface is fully swabbable.
  • the outlet end of the cannula is shaped so as to provide a back-pressure seal with the attachment section of the gland member.
  • the attachment section of the gland member is stretched as the valve is urged by the nozzle from the valve's closed mode to the valve's opened mode.
  • the tubular section of the gland member is preferably compressed as the valve is urged by the nozzle from the valve's closed mode to the valve's opened mode.
  • the outlet end of the cannula is shaped (e.g., as a leaf spring) to provide a flexible member that urges the cannula into the first position.
  • the housing preferably includes gland-stopping structure for stopping movement of the gland towards the outlet section of the valve independently of movement of the cannula.
  • Cannula-stopping structure may also be provided, on the housing or on the cannula's outlet end, for stopping movement of the cannula towards the outlet section of the valve while permitting flow to the outlet section of the valve.
  • FIG. 1 shows a longitudinal sectional view of a valve according to one embodiment of the invention.
  • FIGS. 2-6 show longitudinal sectional views of the valve shown in FIG. 1, as the valve is urged by a luer-taper nozzle from a fully closed position to a fully open position.
  • FIGS. 7-9 show longitudinal section views of three alternative embodiments of the gland that may be used in the valve shown in FIG. 1.
  • FIG. 10 shows an alternative embodiment of the invention in the closed position.
  • FIG. 11 shows a variation of the FIG. 10 embodiment in the open position.
  • FIG. 12 shows a another alternative embodiment of the invention.
  • FIG. 13 shows a variation of the FIG. 1 embodiment.
  • FIG. 13A shows a cross section of the FIG. 13 embodiment.
  • FIGS. 14A-14C shows how the gland's seal section opens in response to a nozzle being inserted into the valve.
  • FIG. 15 shows a longitudinal sectional view of a valve according to another embodiment of the invention.
  • FIGS. 16A-16D show longitudinal sectional views of the valve shown in FIG. 15, as the valve is urged by a luer-taper nozzle from a fully closed position to a fully open position.
  • FIGS. 16E-16G show end views of the seal section of FIGS. 16D-16D respectively.
  • FIG. 17 shows a longitudinal sectional view of a valve according to another embodiment of the invention.
  • FIGS. 18A-18D show longitudinal sectional views of the valve shown in FIG. 17, as the valve is urged by a luer-taper nozzle from a substantially fully closed position to a substantially fully open position.
  • the valve is made from four components: an inlet housing portion 34, an outlet housing portion 48, a gland 12 and a movable, rigid interior cannula 14.
  • the two housing portions preferably are ultrasonically shear welded together at area 30, so as to form an integral housing and so as to hold one end of the gland 12 in a gland-retention area 32. Fluid passing through the valve passes through the cannula 14, which is located within the gland 12, which in turn is located within the housing.
  • the gland 12 has three sections: a swabbable seal section 10, a tubular section 18 and an attachment section 20.
  • the valve is made from silicone.
  • the seal section 10 has an aperture 42 passing through it; the aperture 42 may be, for example, a pierced hole or a slit.
  • the aperture 42 is held closed by the inner surface of the housing; the inner diameter of the housing at the inlet is smaller than the outer diameter of the seal section 10 of the gland 12, so that the housing squeezes the seal section 12, thereby forcing the aperture 42 closed.
  • This compression zone 40 of the passageway through the housing is tapered to accept and hold a luer-tapered nozzle (item 60 in FIG. 2).
  • a second zone 44 has an inner diameter that is greater than that of the tapered, compression zone 40 and greater than the outer diameter of the seal section 10, so that the seal section may expand when it is forced into this zone, thereby permitting the aperture 42 to open.
  • the inlet housing portion 34 preferably includes a vent 16 to ease the movement of the seal section 10 between the expanding zone and the tapered zone.
  • the tubular section 18 of the gland 12 is preferably designed to be compressible.
  • Another section 54 of the gland 12, located between the seal section and the compressible, tubular section may be shaped to match a corresponding ledge 56 on the cannula 14, so as to hold the top section of the gland 12 in place on the cannula.
  • the valve has a second seal area 22 at the outlet end of the cannula 14.
  • the outlet end 58 of the cannula 14 is shaped so as to provide a seal against the gland 12.
  • the cannula's outlet end 58 has a wider outer diameter than the inner diameter of the compressible, tubular section 18 of the gland, and the fluid passageway 36 through the cannula has a channel 28 that redirects the passageway sideways into the gland 12. This arrangement forms a seal when the valve is in the closed position, as shown in FIG. 1, and is able to resist a large amount of back pressure from the outlet end 50 of the valve.
  • the inlet housing portion 34 preferably includes a rigid annular extension 33 that separates the gland's tubular section 18 from the gland's attachment section 20.
  • This annular extension 33 ensures that the tubular and attachment sections of the gland 12 do not fold incorrectly when the valve is opened and closed.
  • the annular extension 33 in connection with the gland, ensures that the cannula's outlet section 58 does not get forced too far up into the inlet section by a large amount of back pressure.
  • the annular extension 33 also prevents the lower portion of the gland 12 from being forced too far up into the inlet section.
  • valve Since the valve has a second seal area 22, formed by the cannula's outlet end 58, that is able to resist large back pressures, the first seal--the aperture 42 through the gland's seal section 10--does not have to resist large back pressures.
  • the gland's tubular section 18 is preloaded, by making the gland's tubular section sufficiently long with respect to the distance between the cannula's ledge 56 and the cannula's outlet end 58, so that the gland's tubular section is under compression even when the valve is in the closed position.
  • This arrangement improves the effectiveness of the second seal area 22.
  • the valve is made more resistant to opening in response to either a positive pressure or a negative pressure applied to the outlet 50.
  • the effect on a closed valve of a negative pressure at the outlet will be to pull the gland toward the outlet along with the cannula 14.
  • the second seal area 22 remains sealed.
  • the cannula's outlet end 58 may be made thin, so that in an emergency a needle--instead of a luer-taper nozzle--may be used with the valve.
  • the needle may be inserted through the seal section's aperture 42 through the cannula's passageway, and then, if the outlet end 58 is made thin enough, the needle may pierce the outlet so that medication may be injected through the valve.
  • the outlet end does need to be strong enough to resist whatever level of back pressure may be expected from the valve's outlet 50.
  • the outlet housing portion 48 includes a ledge 24 to prevent the gland 12--in particular, the gland's attachment section 20--from extending too far towards the valve's outlet 50.
  • This ledge 24 does not stop the movement of the cannula 14 towards the outlet 50; thus, the cannula's outlet end 58 may continue to move toward the valve's outlet 50 and separate from the gland 12, thereby opening the second seal area 22, if it has not yet opened.
  • the outlet housing portion 48 also includes ribs 26 for stopping the movement of the cannula 14 toward the valve's outlet 50, while permitting flow from the cannula 14 between the ribs 26 to the valve's outlet.
  • the interior surface of the gland's seal section 10 has a small hollow area 46 shaped to receive the inlet end 38 of the cannula 14.
  • the inlet end of the cannula 14 is shaped to cause the opening of the seal section's aperture 42 when the seal section 10 is squeezed between the cannula 14 and the nozzle with sufficient force.
  • the seal section 10 is pressed toward the cannula 14, causing the hollow area 46 of the seal section 10 down over the inlet end 38 of the cannula 14, as shown in FIG. 2. This motion causes the top of the inlet section 10 to fall below the exterior inlet face 52 of the housing, thereby facilitating the centering of the nozzle 60.
  • the vent 16 allows the gland 12 to separate from the expanding zone 44 of the inlet housing portion 34, thereby easing the movement of the gland 12 through the inlet housing portion 34.
  • the cannula's outlet end 58 separates from the gland 12, thereby opening up the second seal area 22. This opening of the second seal area occurs as the compressible, tubular section 18 of the gland 12 is compressed by the nozzle 60 pushing the cannula 14 downward.
  • FIG. 4 further insertion of the nozzle 60 into the valve results in the attachment section 20 of the gland stretching until it reaches the ledge 24, which prevents further stretching of the attachment section 20.
  • FIG. 5 shows the nozzle 60 and the cannula's inlet end 38 having forced open the aperture 42 in the gland's seal section 10. Because the seal section 10 is in the widened zone 44 of the housing's passageway, the seal section 10 has room to spread. After the seal section's aperture 42 is opened, the luer-taper nozzle 60 should become fully seated in the tapered zone 40 of the inlet. If the nozzle 60 forces the cannula 14 too far down, movement of the cannula 14 will be stopped by ribs 26. The ribs 26 permit flow between the cannula's outlet end and the outlet housing portion 48, even when the cannula 14 is pushed down all the way.
  • the stretched attachment section 20 of the gland and the compressed tubular section of the gland 18 tend to return to their original shapes, causing the seal section 10 to be forced back into the tapered zone 40. Since, as noted above, the tapered zone 40 has a smaller diameter than the outer diameter of the seal section 10, the aperture 42 is squeezed closed, thereby returning the valve to its closed mode.
  • FIG. 7 shows an alternative embodiment for the gland 20 shown in FIG. 1.
  • the FIG. 7 gland is molded in two shots, so that the attachment section 20 is made of a type of silicone or other material that has good stretching properties, while the rest of the gland is made of material that has good compression properties.
  • FIG. 8 shows a gland 12 made according to a method that simplifies molding considerations.
  • the gland 12 is molded in the shape shown in FIG. 8, which shape is simpler to mold than the gland shape shown in FIGS. 1 and 7; the attachment section 20 is folded upward prior to it being attached to the gland retention area (item 32 in FIG. 1) between the inlet housing portion 34 and the outlet housing portion 48 during ultrasonic welding.
  • FIG. 9 shows a preferred embodiment of the gland that may be used in the FIG. 1 valve.
  • the tubular section 18a of the gland instead of being accordion-shaped like the gland shown in FIG. 1, has a simple annular design.
  • this tubular section 18a is preferably preloaded in a compressed state when the valve is closed in order to maintain sufficient sealing force at the seal area against the outlet end of the cannula 14.
  • preloading may be accomplished by making the tubular section 18a between the seal area 22 and the section 54 of the gland that corresponds to the ledge on the cannula longer than the corresponding section on the cannula 14.
  • the contact between the attachment section and the housing may be limited to a wiper member 74.
  • the wiper member 74 helps ensure that liquid does not make its way up into the section between the attachment section 20b and the housing, while reducing the contact area between the attachment section 20b and the housing.
  • the attachment section 20b may include a vent port therethrough in order to prevent a vacuum forming between the attachment section and the housing.
  • FIG. 10 shows an alternative valve design, wherein the cannula's outlet end 58a includes a leaf spring 62 to urge the cannula 14a up into its closed position.
  • a widened area of the cannula's outlet end 58a in the FIG. 10 valve forms a second seal area 22a, and a diverter channel 28a redirects flow from the cannula's main passageway 36a.
  • the attachment section 20a of the gland 12a in the FIG. 10 valve is not stretched, but rather it folds upon itself.
  • FIG. 11 shows a variation of the FIG. 10 valve. The FIG. 11 valve is shown in the open position. As shown in FIG.
  • the gland's attachment section 20a is folded as the valve is opened.
  • the cannula's outlet end 22b is shaped so as to prevent further movement of the cannula towards the valve's outlet 50 while still permitting flow to the outlet.
  • FIG. 12 shows a variation of the FIG. 11 valve with a different variation of the leaf spring 62a.
  • a portion of the tapered zone 40b of the valve's inlet has ribs 64, while another portion 65 of the tapered zone 40b has a frusto-conical shape that is able to maintain contact around the entire circumference of the nozzle.
  • the frusto-conical portion 65 maintains a seal between the nozzle and the valve housing when the nozzle is inserted all the way into the valve.
  • the ribs 64 reduce the friction between the gland's seal section 10b and the tapered zone, so as to make it easier for the seal section 10b to return to its closed position when the nozzle is removed from the valve.
  • the ribs 64 also provide a stronger hold on an inserted nozzle than if the entire tapered zone 40b had frusto-conical shape.
  • the ribs provide a further benefit if a vent is not provided in the inlet housing portion: the ribs reduce the length that the gland has to travel without the space between the gland and the inlet housing portion being vented to atmosphere.
  • FIG. 13 shows the valve of FIG. 1 adapted to include ribs 64a in the tapered zone 40 of the inlet section. These ribs 64a may also be seen in FIG. 13A, which shows a cross section through the inlet section 40 of the FIG. 13 valve.
  • FIG. 13 also shows the tapered sections of the housing passageway that enable the cannula to properly return from the fully open position to the closed position.
  • the passageway may be considered to include three tapered sections (among other sections).
  • the first section begins at the aperture compression zone 40 and converges toward a point "X."
  • the aperture compression zone 40 has an inner diameter of about 0.169 inches and converges toward point X, which has an inner diameter of about 0.162 inches.
  • the second section begins at point X and diverges toward a point "Y" which, in preferred embodiments, may have an inner diameter of about 0.167 inches.
  • the third section begins at point Y and diverges to a point "Z" which, in preferred embodiments, may having an inner diameter of about 0.200 inches.
  • FIGS. 14A-14C show how the seal section 10 of the gland may respond to the insertion of a nozzle 60 into the valve.
  • the aperture 42 is closed with both the bottom, point A, and the top, point B, of the aperture being pressed together by the tapered zone of the housing 40.
  • the exterior of the housing's inlet section preferably includes threads 82 to accept luer-lock threads surrounding a nozzle.
  • the nozzle 60 pushes the gland's seal section away from the exterior inlet face 52 and the tapered section 40 of the inlet.
  • the aperture 42 opens, with the point B of the aperture spreading more than point A, as shown in FIG. 14B.
  • the shaping of the cannula's inlet end allows the aperture 42 to be opened quickly and closed quickly.
  • the seal section 10 of the gland is prevented from being forced too far down the cannula by step 80 on the cannula.
  • a portion of the gland remains between the cannula's inlet end 38 and the nozzle 60.
  • the tip of the cannula's inlet end is preferably rounded (bullet-nosed) to minimize cutting of the gland material between the cannula and the nozzle and to promote the centering of the cannula's inlet end 38 with respect to the nozzle.
  • FIG. 15 shows an alternative embodiment of the invention.
  • This embodiment is similar to the FIG. 1 embodiment, as the FIG. 15 embodiment includes a movable center cannula 14b, located inside a gland 12b, which in turn is located within the passageway formed by the inlet housing portion 34 and the outlet housing portion 48.
  • the gland's seal section 10b When the valve is in the closed position, the gland's seal section 10b is spaced away from the top end 80b of the cannula 14b.
  • the gland's seal section 10b moves towards the cannula's top surface 80b. This movement is limited by a step 91 on the inner surface of the gland 14b, which prevents the seal section 10b from moving past cannula's top surface 80b.
  • the seal section 10b is substantially aligned with the exterior inlet face 52 and extends slightly beyond the exterior inlet face, so as to provide a swabbable surface.
  • the outer diameter of the seal section 10b is a little greater than the inner diameter of the inlet's tapered section 40, so that the resulting pressure keeps the aperture 42 closed when the valve is in the closed position. Because the valve includes a high-pressure seal area 22, the seal section's aperture 42 does not have to resist high back pressure.
  • the gland's seal section 10b is urged towards the cannula 14b, which in turn is urged towards the valve's outlet 50.
  • the seal section 10 moves from the inlet's tapered section 40 to the inlet's expanding section 44, which has a greater inner diameter than the seal section's outer diameter, the aperture 42 in the gland's seal section 10 begins to open, as can be seen in FIG. 16E.
  • the cannula's outlet end 58 begins to separate from the gland 12b, opening the high-pressure seal and providing fluid communication between the cannula's transverse passage 28 and the valve's outlet 50.
  • the seal section 10b moves further in the inlet's expanding section 44, so that the increasing inner diameter of the inlet permits the seal section's aperture 42 to open further, as shown in FIG. 16F.
  • the step 91 on the inner surface of the gland 14b is pressed against the top surface 80b of the cannula 14b, so that further movement of the seal section 10b towards the cannula 14b causes deformation of the sidewalls 93 of the gland 12b adjacent the seal section 10b.
  • FIG. 16D shows the nozzle 60 fully inserted into the valve.
  • the seal section's aperture 42 is fully opened, as shown in FIG. 16G.
  • FIG. 17 shows another alternative embodiment of the invention.
  • This embodiment is similar to the embodiment shown in FIG. 15 since it includes a movable center cannula 14c, located inside a gland 12c, which in turn is located within the passageway formed by the inlet housing portion 34 and the outlet housing portion 48.
  • the gland's seal section 10c is spaced away from the top end 80c of the cannula 14c.
  • the gland's seal section 10c moves towards the cannula's top surface 80c. This movement is limited by a step 91c on the inner surface of the gland 12c, which prevents the seal section 10c from moving past cannula's top surface 80c.
  • the gland 12c of FIG. 17 includes a ridge 97 that normally is seated on a ledge 98 formed by the interior walls of the outlet housing portion 48.
  • the tapered outlet end 58c of the cannula 14c includes ribs 99 for limiting longitudinal motion of the cannula 14c toward the outlet end 50 of the valve. Accordingly, there is no need for ribs to protrude from the interior walls of the outlet housing portion 48.
  • FIGS. 18A-18D show of the valve of FIG. 17 as it is urged by a luer-taper nozzle 60 from a substantially fully closed position to a substantially fully open position.
  • the seal section 10c is substantially aligned with the exterior inlet face 52 and extends slightly beyond the exterior inlet face to provide a swabbable surface.
  • the outer diameter of the seal section 10c is a little greater than the inner diameter of the inlet's tapered section 40, so that the resulting pressure keeps the aperture 42 closed when the valve is in the closed position. Because the valve includes the high-pressure seal area 22, the seal aperture 42 does not have to resist high back pressure.
  • the gland's seal section 10c is urged towards the cannula 14c, which in turn is urged towards the valve's outlet 50.
  • the seal section 10c moves from the inlet's tapered section 40 to the inlet's expanding section 44, which has a greater inner diameter than the seal section's outer diameter, the aperture 42 in the gland's seal section 10c begins to open.
  • the cannula's outlet end 58c begins to separate from the gland 12c, opening the high-pressure seal and providing fluid communication between the cannula's transverse passage 28 and the valve's outlet 50.
  • the seal section 10c moves further in the inlet's expanding section 44, so that the increasing inner diameter of the inlet permits the seal section's aperture 42 to open further.
  • the step 91c on the inner surface of the gland 12c is pressed against the top surface 80c of the cannula 14c, so that further movement of the seal section 10c towards the cannula 14c causes deformation of the sidewalls 93 of the gland 12c adjacent the seal section 10c.
  • FIG. 18D shows the nozzle 60 fully inserted into the valve with the seal section's aperture 42 fully opened.
  • the seal section 10c is able to spring back to its original position quickly, when the nozzle is removed from the valve.
  • the ribs 99 on the outlet end 58c of the cannula 14c limit further longitudinal movement of the cannula 14c toward the outlet 50. It should be noted that the ridge 97 remains seated on the ledge 98 throughout the entire process shown in FIGS. 18A-18D.

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US09/394,169 1996-11-18 1999-09-13 Swabbable luer-activated valve Expired - Lifetime US6039302A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US09/394,169 US6039302A (en) 1996-11-18 1999-09-13 Swabbable luer-activated valve
US09/479,327 US6883778B1 (en) 1996-11-18 2000-01-06 Apparatus for reducing fluid drawback through a medical valve
US09/810,087 US7100890B2 (en) 1996-11-18 2001-03-16 Swabbable luer-activated valve
US10/700,344 US7789864B2 (en) 1996-11-18 2003-11-03 Luer-activated valve

Applications Claiming Priority (4)

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US3117596P 1996-11-18 1996-11-18
US3470897P 1997-01-03 1997-01-03
US97012597A 1997-11-13 1997-11-13
US09/394,169 US6039302A (en) 1996-11-18 1999-09-13 Swabbable luer-activated valve

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US97012597A Continuation 1996-11-18 1997-11-13

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US09/479,327 Continuation-In-Part US6883778B1 (en) 1996-11-18 2000-01-06 Apparatus for reducing fluid drawback through a medical valve
US09/479,327 Continuation US6883778B1 (en) 1996-11-18 2000-01-06 Apparatus for reducing fluid drawback through a medical valve

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US6039302A true US6039302A (en) 2000-03-21

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